异名：Dolichos sesquipedalis L. (synonym)、Vigna sesquipedalis (L.) Agcaoili (synonym)、Vigna sinensis (L.) Savi ex Hassk. subsp. sesquipedalis (L.) Van Eselt. (synonym)、Vigna sinensis (L.) Savi ex Hassk. subsp. sinensis Mansf. (synonym)、Vigna sinensis (L.) Savi ex Hassk. var. sesquipedalis (L.) Asch. et Schweinf. (synonym)、Vigna unguiculata (L.) Walp. subsp. sesquipedalis (L.) Verdc. (synonym)、Vigna unguiculata (L.) Walp. var. sesquipedalis (L.) Bertoni (synonym)

俗名：饭豆 (FànDòu) Chinese、红豆 (HóngDòu) Chinese

豆角（通称），尺八豇

图版69

Vigna unguiculata subsp. sesquipedalis (Linn.) Verdc. in Davies, Fl. Turkey 3:266. 1970, et in Kew Bull. 24: 544. 1970.——Dolichos sesquipedalis Linn. Sp. Pl. ed. 2, 1019. 1763.——Vigna sinensis (Linn.) Hassk. var. sesquipedalis (Linn.) Aschers. et Schweinf. Ill. Fl. Egypt in Mem. Ist. Egypt. 2: 69. 1889.——V. sesquipedalis (Linn.) Fruhw. Anbau Hulsenfr. 254. 1898;中国主要植物图说•豆科719. 1955.——V. sinensis (Linn.) Hassk. subsp. sesquipedalis (Linn.) Van Eseltine in Hedrick, Veg. New York 1(2):11. 1931.——V. sesquipedalis (Linn.) Verdc. var. sesquipedalis (Linn). Ohashi in Fl. E. Him. 3: 71. 1975: Hara et Williams, Enum. Fl. Pl. Nepal. 2:133. 1979.

一年生攀援植物，长2-4米。荚果长30-70（-90）厘米，宽4-8毫米，下垂，嫩时多少膨胀；种子肾形，长8-12毫米。花、果期夏季。

我国各地常见栽培．非洲及亚洲的热带及温带地区均有栽培。

嫩荚作蔬菜，品种依荚的色泽可大致为白皮种（淡绿色）、青皮种、红皮种及斑纹种四种。